Opcodes vs PC 110

Opcodes – The Retro CPU Reference The definitive opcode reference for the legendary processors that launched the personal computer revolution. Whether you're a retrocomputing enthusiast, a student of computer history, writing code for classic hardware, or just a big old nerd - the Opcodes app gives you everything you need. Eighteen iconic processors covered: Intel 4004 · Intel 8008 · Intel 8080 · Intel 8085 · Intel 8088 · Zilog Z80 · Motorola 6800 · Intel 8085 · Motorola 6809 · MOS 6502 · Signetics 2650 · RCA 1802 - SC/MP · Motorola 68000 · Intel 8086 · WDC 65816 · Texas Instruments TMS9900 · INMOS Transputer · ARM2 For every opcode:  • Full description of what the instruction does. • Hex, octal, and decimal values. • Flags affected. • Addressing modes and cycle counts. • Assembly code examples - including loops, conditionals, and common patterns. More than just opcodes:  • CPU history and historical context. • IC pinout diagrams. • Notable systems that used each CPU, with memory maps and other background information. • Chip variants and successors. • A silly card game(!) • Simple assembler / disassembler for many CPUs. Built for exploration:  • Search for opcodes by name or category. • Sort by mnemonic, opcode byte, or category. • Filter by category, Quick Find with a colorful map. • Undocumented instructions clearly marked and optionally displayed. More than microprocessors:  • Information on key support chips: video, sound, memory and more. Cool design:  • Clean, readable layout optimised for quick reference. • Multiple colour themes. • Full "dark mode" support. Everything is included with absolutely no in-app purchase required. Recent additions: • Quiz game - test your CPU knowledge! • Share CPU cards - beautiful shareable images showing specs and history for any processor • External references - curated links to community resources for all 18 CPUs • "Opcodes display first" setting - choose whether selecting a CPU shows opcodes or info first • Chip-maker colour themes - Zilog, MOS Tech, and Motorola replace the old themes • Enhanced 6502 docs - JMP page boundary bug, BRK behaviour, and Read-Modify-Write quirks • Fixed Scratchpad hang when switching tabs

PC110 Atlas is an interactive museum, hardware explorer, and emulator host dedicated to the palm-size PC that arrived in 1995. RUN YOUR OWN MACHINE Bring firmware and system media that you lawfully obtained from your own hardware. Package Import verifies a single ZIP and installs all recognized files together. Advanced Import lets experienced users manage each file individually. No firmware, operating system, or PersonaWare image is included. RUN IT ON MAC Use the complete emulator and research library on macOS 14 or later. Select BIOS, hard-disk, floppy, and CD images with the standard Mac file picker. Imported media remains inside the app sandbox unless you choose another file. USE THE WHOLE KEYBOARD The full PC110 console becomes a touch surface. Every visible key and colored control maps to the emulated machine, including the distinctive Japanese key layout and two-part Enter key. CONTROL IT FROM APPLE WATCH The included Apple Watch companion mirrors the live PC110 display and guest audio from the paired iPhone, provides pointer and keyboard controls, and offers shortcuts for all sixteen original PersonaWare launcher applications. Fit shows the complete display, while zoom and pan make small guest controls easier to read. QEMU and imported media remain on the iPhone. EXPLORE THE HARDWARE Orbit a detailed 3D reconstruction of the mainboard, pinch to zoom, separate the stack, fade individual copper layers, and reveal the component overlays on both sides. Switch to annotated board views to learn how the 486SX, SCAMP IV, Bowman, Pluto, VGA, audio, storage, and PC Card subsystems work together. FOLLOW THE SCHEMATIC Navigate the reconstructed schematic by functional sheet, then zoom and pan through the original vector evidence without relying on optical captures. ENTER THE ARCHIVE Discover the machine through a factual timeline, original design notes, an illustrated PersonaWare history, and direct links to the open hardware project. PC110 Atlas is an independent historical and preservation project. IBM and the IBM logo are trademarks of International Business Machines Corporation. PersonaWare and other product names belong to their respective owners. The app is not affiliated with or endorsed by IBM.